It worked for 1 domU, but when doing this with another domU, it resulted
in a not responding system because of the load.
Memory is not the problem (dom0 has 746 MB).
This night I made a perfect backup by putting rsyncd.daemon on the
domU''s, and rsyncing over ethernet to dom0.
There is nothing in the logs (messages,syslog,xend), not a single line.
The problem is within the snapshot I think, it gives me a instant load,
but not all the times (about 50% is done without a load-peak)
This is done within 2-seconds:
@xen1:~# cat /proc/loadavg
0.02 0.02 0.00 1/72 8252
@xen1:~# /sbin/lvcreate -L12G -s -n arrowsnapshot /dev/xen-vol/arrow-disk
Logical volume "arrowsnapshot" created
@xen1:~# cat /proc/loadavg
0.33 0.08 0.03 1/71 8306
Althoug the .33 isn''t a problem, the load when crashed was more than 4
(maximum of mrtg-measurement)
Marc Patino Gómez schreef:> Hi,
>
> I used these steps to backup my domUs and never I had this problem.
>
>
> Pascal Nobus wrote:
>> .... seem to be a never ending story ...
>> I''ve found the problem of my crashes (two days on a row now).
>>
>> I''m using lvm2 as a filesystem, and was doing
backup''s like this:
>> - take a snapshot of a running system
>> - mount the snapshot
>> - rsync the snapshot to my backup-partition.
>> - umount the snapshot
>> - remove the snaphost
> Have your dom0 enough memory? Snapshots requires some aditional memory,
> so if you had your dom0 limited to 256MB of RAM it could be a problem.
>
> To prevent a not responding system you can use "renice" command
to
> schedule rsync command with low priority.
>
> If you can post more info, like log output of the crash , probably
> someone in the list could help you.
>
> Regards,
>
> Marc
>>
>> This resulted in a huge load, which was increased 1 hour later, and
>> resulted in a not-responding system.
>>
>>
>> I googled now for 2 days, and found many discussions, but I cannot
>> find a proper and stable solution.
>> Should I maybe just mount the domU over the network (portmap) to have
>> a non-crashing solution?
>>
>> Best regards,
>> Pascal
>>
>>
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>
>
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